For U16 races usually 30-45 minutes. Bikes, bog standard road, quite often on machines that cost more than most of us would spend on ourselves. The real hardcore will be on Tubs tyres but I always thought they were more hassle than they were worth. Also there was a big fashion for warming up on rollers not turbo's to show how pro/skillful you were. I take it gear restrictions are the same in France, ( usually 52 teeth up front smallest cog 16 on the rear,) you are usually allowed to use the outer limiter screw if you don't have the right cassette. I dont know of any 11 speed specific junior or youth cassette. Gear restrictions are usually religiously tested before the race. Most circuit races will allow a lap out for punctures, gear trouble is usually tough luck depends on the race officials.If in doubt,ask. Wheel changes are usually only allowed in a pit area but sometimes anywhere on the circuit. Ensure you have a spare set of wheels in the designated pits area. If a major race the girls will not have to race with the boys, totally separate races, smaller races they can either race with the boys or start off 10-30 seconds or so behind them and is supposed to be a separate race. This sometimes caused problems as to whether it was ok for the fast girls to chase down and join in the boys using them as a draft vehicle. Seen lots of disputes where people complained of unfair advantage by girls drafting boys, this is quit often due to the race officials not making the rules clear enough. If in doubt ask loudly so every one else hears as well.
